Plans are moving ahead to build a light rail connection to Los Angeles International Airport.
A report Monday to airport commissioners offered four potential station sites for a commuter rail line. The station would link to a people mover serving passenger terminals.
Currently, no passenger rail lines run directly to the nation's third-busiest airport. Travelers must arrive and depart by private car, a taxi service or shuttle bus.
The airport staff recommended building the station at the airport. Two other potential sites are outside of LAX.
The Los Angeles Times says the most expensive option would be an underground station inside the central terminal area.
A station could open by 2020 if the project receives funding and environmental approval.
Below is a map that shows the approximate locations of the four potential rail stations, two of which would be located underneath the terminals, according to Los Angeles World Airports staff:
View LAX commuter rail proposal in a larger map